WinBtrfs - an open-source btrfs driver for Windows

Development of userspace BTRFS tools

Janus: a state-of-the-art file system fuzzer on Linux

Tiny Btrfs maintenance daemon

Linux kernel source tree -- Btrfs commits

Fast block device sync with digest, designed to improve block-based backups.

Policy-Driven Multi-Tier File System

Haskell bindings to the btrfs API

Rough parser for btrfs file systems, test for adoption of btrfs in Cardinal

Fork of kdave/btrfs-progs, allowing to build distinct binaries for specific btrfs subcommands with elevated privileges (fscaps, setuid)

Simple null block device manager script, useful for zoned device testing.

A few useful BTRFS utilities

KISS tools for make snapshots in a Btrfs filesystem

Creating a NOCOW copy while trying to be smart to save disk space during the process.

CLI to share some the data of one file with another file, zero-copy via reflinks